Smart windows that go from clear to dark in under a minute

Engineers have developed dynamic windows that can switch from transparent to opaque or back again in under a minute and do not degrade over time. The prototypes are plates of conductive glass outlined with metal ions that spread out over the surface, b...

Engineers have developed dynamic windows that can switch from transparent to opaque or back again in under a minute and do not degrade over time. The prototypes are plates of conductive glass outlined with metal ions that spread out over the surface, blocking light, in response to electrical current.